2023届高考英语二轮复习条件状语从句课件

这是一份2023届高考英语二轮复习条件状语从句课件，共15页。PPT课件主要包含了didwere等内容，欢迎下载使用。
if 条件句      条件句表可能，主句多用将来时；      条件句表事实，主句常用现在时。如从句谈论的是一个有可能发生的事实及其产生的相关的结果，主将从现We can walk there if we can't find a bus .If it rains tmrrw ,we will nt g  t the z.如从句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。 If bears are in danger, they attack peple. 
引导条件状语从句的连词有： if（如果）， unless（除非；如果不 = if nt）， as（s） lng as（只要）， suppse（that），suppsing, prvided (that), prviding（假使）， n cnditin that（条件是）， in case（万一），nce（一旦），when=if
If there is anther snw, the rad will be blcked. (主将从现)Yu will fail t arrive there in time unless yu start earlier.Yu may use the bk s lng as yu will return it n time. 只要你准时还， 你就可以借这本书。
I will g, prviding/prvided (that) my expenses are paid. 只要我的费用有人付， 我就去。 Suppse/Suppsing (that) he des nt cme, what shall we d? 他要是不来， 我们该怎么办？ In case he cmes, let me knw. 如果他来的话， 告诉我一声。
I shall give yu my dictinary n cnditin that yu return it tmrrw. 我将把我的字典给你， 如果你明天要还的话。 Turn ff the switch when anything ges wrng with the machine.如果机器出故障，就把开关关上Once yu begin, yu must cntinue.
nly if 和 if nly的用法区别
一、nly if 只有…； 只要…; 引导陈述语气的真实条件句 I will cme hme nly if yu cme with me. = I will nly cme hme if yu cme with me. 如放句首，主句要半倒装（仅起突出作用，并不改变if词义）Only if yu have a receipt will we change the gds.Only if yu cme here tmrrw will we g camping
if nly 一表“只要”，陈述语气，与 nly if 相似I will cme nly if yu prmise nt t invite Mary. 二表“但愿”、“要是…就好了”，虚拟语气表对现时、未来、过去事实相反的愿望. If nly I were rich. If nly it wuld stp raining. If nly I hadn’t tld him abut it.
wuld,culd,shuld+have dne
If yu had cme yesterday, we wuld have had dinner tgether.
wuld, culd, shuld + 动原
If I were yu, I shuld stay hme.
shuld dwere t d were / did (较少）
If it were t rain tmrrw, the meeting wuld be put ff.
if 省略句 / 非真实条件状语从句的倒装省略 if ，但要把 were, had ,shuld 提到句首，变为倒装句式但动词过去式不可以与主语倒装If he were here , he wuld cme t ur help.= ( Were he here, ) If he had had lunch , he wuld nt have eaten s many ckies.(= Had he had lunch, )If it shuld snw tmrrw, we wuld put ff ur trip.(=Shuld it snw tmrrw, )
错综时间条件句 : 当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时.动词的形式要根据它所表示的时间作出相应的调整。If yu had taken the dctr's advice, yu wuld feel better nw.
含蓄条件句有时为了表达的需要，在含有虚拟语气的句子中并不总是出现 if 引导的条件句，而是通过其他手段来代替条件句。 ①虚拟条件句隐含在上下文中。 Yu culd have caught the first bus （ if yu had gt up earlier ). ②用一个词代替条件从句。He was ill yesterday; therwise he wuld have gne t the film.
③用不定式代替条件从句。 It wuld be a mistake nt t help him. = if we didn‘t help him ④用介词短语代替条件从句。 Withut yur help, we culdn't have passed the exam. =If yu hadn't helped us, But fr the heavy rain, I wuld g t the park. = If it were nt fr the heavy rain, 如果不是下大雨，我就会去公园。